wrigley



.No. 750,147. I

PATENTBD JAN. 19, 1904.

. E. WRIGLEY'. STOP MOTION DEVICE FOR KNITTING MACHINES.

APPLICATION FILED JUNE Is. 1903.

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STOP MOTION DEVICE vFOR KNITTING MACHINES.

APPLIOATION FILED mm: 16, 1903. I no MODEL. a sums-sum 2.

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' PATBNTED JAN. 19,1904.

. v E. WRIGLEY. STOP MOTION DEVICE FOR KNITTING .MAOHINBS.'

APPLICATION FILED JUNE 16, 1903.

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. i UNITED STATES Patented .Tanriary 19, 1904. i

PATENT ,OFFICE.

"STOP-MOTION DEVICE FOR KNITTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 750,147, dated January19, 1904.

I Application filed June 16, 1903. Serial No, 161,707. (No model.)

To all whom it may concern:

Be-it known that I, EMANUEL WRIGLEY, a citizen of the United States,residing at Woonsocket, in the county of Providence and State of RhodeIsland, have invented new and useful Improvements in Stop-Motion Devicesfor Knitting-Machines, of which the following is a specification.

: My invention relates to a stop-motion device for knitting-machines,and has for its object to construct an improved device of this characterwhich will be operated on encountering a hole in the fabric to stop themachine. I Y

The simple and novel construction employed by me in carrying out myinvention is fully described and claimed in this specification andillustrated in the accompanying drawings, forming a part thereof, inwhich- Figure 1 is a plan view of my device. 2 is a section on the line2 2, Fig. 1. Fig. 3 is a detail plan of a hand-operated stop-motiondevice in common use and which can be conveniently used in combinationwith my device. Fig 4: is a detail plan of another form of hand-operatedstop-motion which I may use. Fig. 5 is a side elevation of my device 1ncomblnatlon with a knitting-machine shown Flg. 6 1s a vertical sectionof a knitting-machine. Fig. 7 is a plan view of the shifting mechanism.Fig. 8 is an elevation of the same, partly in section. Fig. 9 is adetail perspective of the shipper and latch mechanism engaging the same.

Like characters of reference designate like parts in the different viewsof the drawings.

The numeral 1 designates a frame supporting a stationary. cylinder 2,having a bevelededge rim 3 thereon of reduced diameter, on

which a circular set of needles 4 are mounted eled edge 5, is looselymounted on a vertical dial-post 6, having a collar 7 thereon, whichengages a circular. flange 8, formed on the dial 5. Ball-bearings 9 areprovided for the dial 5 to enable the dial-post 6 to be rotated withoutdisturbingthe dial, which is provided with a set ofradially-extendingneedles 9,

which cooperate with the needles 4. A flange Fig.

A horizontal dial 5, having a bev- 10 is .formed on the upper end of thecylinder 2, adjacent to the rim 3, and forms a ledge 11, which serves asa bearing for a hollow vertical cylinder 12, having a flanged lower edge12, which engages the ledge 11. cylinder 12 is closed at its upper endby a head 13, which serves to support a cam-dial 14, located above andparallel with the needledial .5, and a bobbin-rack 15, engaged by dogs16, carried by the head 13. To enable the cylinder 12 to-be driven torotate the camdial 14: and bobbin-rack 15, a series of gearteeth 17 areformed in the bottom of a groove 18 in the flange 10 and are engaged bya gear 19, rigidly fixed on a shaft 20, journaled in bearings supportedon the frame 1, and having a fixed pulley 21 and a loose pulley 22thereon and a wheel bearing a handle 23 to enable the machine to bestarted by hand. The dial-post 6 extends upwardly and passes through anaperture 24 in the cylinder-head 13,- in which it is rigidly fixedagainst turning. The portion of the machine so far described forms nopart of my invention, which will now be described in detail.

Rigidly mounted on the lower end of the dial-post 6 and extendingradially is an arm 25, which carries a trigger-lever 26, fulcrumedintermediate its ends on "a stud 26, seated in the arm 25. A spring 26connected .to the short arm of the lever 26, holds it normally incontact with a stop 26v and in alinement with the arm 25. The longer armof the lever 26 is bored longitudinally to accommodate a pointed finger27, slidingly mounted therein and bearing on the outerend of a coiledspring 28, seated in said bore, a catch 29 engaging a groove 29 to limitthe outward movement of the finger 27. The short arm of thetrigger-lever 26 normally engages the free end of a catch-lever 30,fulcrumed on a pin 30, seated in a standard 31, footed on an arm 31.spring 30 mounted on the standard 31, bears on the catch 30 andyieldingly holds it in contact with a tooth 33, carried by the arm 25and engaging a notch 33 in the under side of the catch-lever 30. Thecatch-lever 30 engages a guide-slot 32, formed in an arm 32, rigidlysecured to the arm 25. The free end of the catch-lever 30 is bent atright angles to form a stop-arm 30, which serves to limit thelongitudinal movement of the lever 30.

To keep the fabric in even tension, so that the finger 27 will have aflat surface to work upon, a tension-plate 34 is adjustably mounted onthe end of the arm 25 by means of screws 35, seated in said arms andfitting slots 36 in said plate 34. The outer end of the plate 34 isrounded off on the corners 34 to adapt it to bear on the fabric withoutinjuring it.

The arm 31, previously mentioned, is rigidly secured to the lower end ofa vertical shaft 37, which passes through a longitudinal bore 38 in thedial-post 6. An elastic metallic band 39 passes over the arm 31 andthrough an aperture in an arm 40 on the arm 25, is stretched taut, andnormally tends to draw the diverging arm 31 away from the fixed arm 25.This action is opposed by the catch-lever 28 until disengaged by thelatch-lever 26, as will further appear.

To enable a movement of arm 31 to operate a stop mechanism, an arm 41 isrigidly secured to the upper end of the shaft 37 and is bent downwardlyto bring it into position to normally rest against a spring-pressedcatch-lever 42, one arm of which engages a notch 43 in the side of aslidingly-mounted plunger 44, surrounded by a spring 45, which engages acollar 46 thereon and tends to oppose the action of the catch 42 andforce down the plunger, which is provided with a head 44 to limit thismovement.

To cooperate with the plunger 44, a wheel 47 is provided and seated onthe rim 11, which is turned off to form a seat therefor, said wheelhaving ratchet-teeth 48 on its periphery whichproject beyond the outeredge of the flange 11. An elbow-lever 49 is mounted with one arm 49engaging the teeth 48 and with the other arm connected by a rod 50 to acatch-lever 51, which normally engages a notch 52, formed in a slidingshipper 53, the fork 54 of which straddles a belt 55, which runs on thepulleys 21 and 22. A spring 56 is connected to the catch-lever 51 andtends to hold it in engagement with a notch, and a spring 57 surrounds aguide-rod 58, passing through an aperture 59 and seated in an arm 60,carried by the shipper. By this arrangement the shipper 53 is operatedby the spring 57 to shift the belt 55 from the tight pulley 21 to theloose pulley 22.

During the operation of knitting the arm 41 touches the catch 42, whichengages the notch 43 in the plunger 44, and the catch-lever 51 engagesthe notch 52 in the shipper 53, and thereby holds the belt'55 on thetight pulley 21, which transmits power to the shaft and drives thecylinder 12 to rotate the dial-post 6 and cam-dial 14 to operate theneedles 9 to knit the fabric A, which as fast as formed passes down intothe cylinder 2. The tensionplate 34 is adjusted to bear lightly on theinner surface of the fabric A. The spring 28 also holds the tip of thefinger 27 in contact with the inner surface of the fabric A. As thedial-post 6 revolves it sweeps the arm and finger 27 around, and shoulda hole or other irregularity in the fabric A be encountered by thefinger 27 its movement would be retarded or wholly stopped and reversed,

which would turn the lever 26 about its pivot 26 and bring the short armthereof in contact with the lever and disengage it from the tooth 33,thereby releasing the arm 31, which will be swung around through theaction of the elastic band 39, thereby rotating the shaft 37 andswinging the arm 41. The moving of the arm 41 will actuate the catch 42and disengage it from the notch in the plunger 44 to release it andpermit the spring to force down the plunger 44 into engagement with oneof the teeth 48 on the wheel 47, with the result that asfthe cylinder 12continues to turn and carry the plunger with it the wheel 47 will beturned to cause the upper arm 49 of the elbow-lever 49 to ride up on oneof the teeth 48 to pull on the connectingrod to raise the catch 51 outof the notch 52, and thereby release the shipper to enable it to beoperated by the spring 56 to shift the belt from the tight pulley 21 tothe loose pulley 22 to stop the machine.

I do not wish to be limited as to details of construction, as these maybe modified in many particulars without departing from the spirit of myinvention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, 1s-

1. In a stop-motion for knitting-machines, the combination of adial-post bearing an arm, a trigger-lever fulcrumed on said arm andbearinga spring-pressed finger located to engage the surface of the knitfabric, a spring yieldingly holding said lever in alinement with saidarm, a shaft rotatably mounted in a longitudinal aperture in saiddial-post and bearing an arm extending at an angle to saidfirstmentioned arm, a catch whereby said shaft is held against turningrelative to said dial-post, said catch being arranged to be disengagedby a pivotal movement of said lever, an elastic member acting inopposition to said catch, an arm carried by said shaft, and meansoperated by said last-mentioned arm whereby the driving means of aknitting-machine is disengaged, substantially as described.

' 2. In a stop-motion device for knitting-machines, the combination withthe dial-post mounted to revolve relative to the surface of the knitfabric, the arm rigidly connected to said dial-post, the pivotedlatch-lever mounted on said arm, the shaft mounted to rotate relative tosaid dial-post, the pivoted catch carried by said arm and located to beengaged by said latch-lever, the tooth mounted on said first-m entionedarm and engaged by said catch,

the elastic member acting in opposition'to said catch to rotate saidshaft, and means operated by a rotation of said shaft to stop theknittingmachine, substantially as described.

3. In a stop-motion for knitting-machines, the combination of the hollowdial-post mounted to rotate relative to the fabric, the rigid armcarried by said dial-post, the shaft rotatably mounted in the bore insaid dial-post, the arm carried by said shaft, the catch mechanismcarried by said last-mentioned arm, the trigger mechanism carried bysaid rigid arm whereby said catch mechanism is operated to release saidarm, and the finger carried by said trigger mechanism and located tobear on the surface of the fabric, and means actuated by the shaft inthe dial-post, to stopthe action of the machine, substantially asdescribed.

4. In a stop-motion for knitting-machines, the combination of the hollowdial-post rotatably mounted relative to the needle-cylinder, the rigidarm carried by said dial-post, the

shaft rotatably mounted in said dial-post, the arm carried by saiddial-post, the slotted tension-plate mounted on said rigid arm, thecatch pivoted to said last-mentioned arm and passing through the slot insaid arm, the stop mounted on said catch and located to engage said armto limit the movement of said catch, the tooth mounted on said rigid armand engaged by said catch, the elastic member connected to said arms andopposing said catch and the trigger carried by said arm and engagingsaid catch, and means actuated by the shaft in the dial-post, to stopthe action of the machine, substantially as described.

In testimony whereof I have hereunto setmy hand in presence of twosubscribing witnesses.

MABEL WRIGLEY, CLARENCE WRIGLEY.

